How to send e-mail from Ubuntu server?Telnet: Unable to connect to remote host: connection timed out. I am sure that remote server can accept mail on port 25. I have succesfully send emails to this remote server from other machine (windows 7).

How to send e-mail from Ubuntu server?Mutt says "sendmail: Cannot open: 25" when I try to send an e-mail. ssmtp says "ssmtp: cannot open: 25" I also said I can send e-mails via Thunderbird, but I think I was wrong. Sorry about that. I get timed-out when sending trying to send e-mails via Thunderbird, and messages about port 25 when using CLI mail clients.